Heat the oil in a large pan over medium-high heat. Add the onion and cook until it begins to brown, about 5 minutes.
Crumble the tofu and add it to the pan along with the nutritional yeast, onion powder, garlic powder, turmeric, oregano, thyme, basil, and kala namak. Stir to coat the tofu in the herbs and spices.
Add the garlic, peppers, tomato, and sausage. Cook for 10 to 15 more minutes, until heated throughout.
Fold in the arugula and top with the shredded mozzarella. Cover and allow the cheese to melt, about 2 or 3 minutes. Serve hot.